I am a Support Engineer with Visioneer Scanners.
This scanner is not supported on Windows 7. This scanner has not been supported since Windows XP and there will be no current updates for this scanner.
As a suggestion, you could call into customer service @ 925-251-6399, opt. 1 to inquire about scanners that are supported on Windows 7.
We also have an extensive support site and knowlegebase at http://www.visioneer.com/en/us/
If you continue to experience trouble, please feel free to contact us by calling 925-251-6399.
Visioneer Scanners Support